Gelli is a Grade II listed building in the Snowdonia National Park local planning authority area, Wales. First listed on 26 May 1995. Lodge.

Gelli

WRENN ID
silent-tallow-soot
Grade
II
Local Planning Authority
Snowdonia National Park
Constituency
Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
Country
Wales
Date first listed
26 May 1995
Type
Lodge
Address
Gelli, Tan-Y-Foel, Brithdir and Llanfachreth, Gwynedd
OS grid reference
SH 759 213
Coordinates
52.77566, -3.84029
Source
Cadw listing

Also on this page: flood risk · radon risk · weather exposure · detailed attributes ↓

Description

Gelli is a building constructed of rubble with an old slate roof featuring exposed purlin ends at the verges. It has an off-set square central stack that includes weather-coursing. The roof is pitched, which creates the appearance of shaved gable ends at the front and rear, despite the lodge's octagonal plan. There is a porch on the south side with a slate roof and weather-coursing where it meets the main block, along with a modern glazed entrance on the west side.

The south-facing side has glazed doors, and above them is a stone lintel inscribed with "RW V AM 1814," referring to Robert Williames and Anna Maria Vaughan, along with a blind oculus above. On the north side, there is a projection that features a tripartite 12-pane window with a central opening casement and a projecting stone sill, with a blind oculus above it.

At the front (west), there is a further single-storey projection with a hipped roof that is shaped segmentally over tall modern French windows. These windows are topped with 19th-century intersecting glazing that includes coloured leaded panes. The building has weather-coursing as previously mentioned, and above the French windows is a square window with a returned label and modern glazing. Similar windows can be found at the rear and on the southeast and northeast angled sides at ground level. There are also blind decorative slits on the northwest and southwest angled sides, with the latter featuring a cross-loop.

Local climate

Gelli sits in one of the wettest parts of the UK, with an average of 1,310 mm of rain a year. This makes it wetter than 95% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 91% of listed buildings.

It experiences an average of 45 freeze-thaw cycles a year, more than 86% of listed buildings. Of these, 26 follow at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.3°C per decade since 1991.

Averages for 1991–2020; temperature trend 1991–2025. Figures describe the wider area (a grid cell of roughly 10 km), not the individual site. Contains modified Copernicus Climate Change Service information 2026.

More on this building

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  • Detailed attributes — period, style, materials, features
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